I don't know how these work, but they do. Bike tire marks, shoe marks, pen marks, blood, whatever. Add a little water, and these things remove all kinds of marks and scuffs from painted walls. The first time you see them work, it's kind of like magic.

Spend 5 bucks and 15 minutes cleaning your walls during a move out and get all your security deposit back.

i really like these for cleaning walls, even rough ones and baseboards somehow they work better than any sponge because they don't leave any residue you can use each one over and over

Used this all over the house. Works unexpectedly well.

The only thing I've seen this product have trouble erasing is stuck-on tape goop. Otherwise, it erases black shoe/tire skid marks and keeps walls and wood trim mark-free. Just go easy on flat and matte water-based paint.

a miracle product. nuff said.

I will never use anything else to clean my bath tub!

These work really well at cleaning my black Macbook which can get a lot of smudges.

I NEVER would have believed it. You know those black scuff marks on the walls you get if you have kids? The ones you repaint or use abrasive powder on? Wet one of these and off they come - a little paint too but it looks great - just don't go down to the drywall.

These things are truly amazing.

Even better that the walls are the job they do on soap scum. It just rolls right off the surface. I've never had such and easy time cleaning soap scum. It still involves a little elbow grease, but it is GONE!

I am sold.